Question

помогите пжж
2)12m-((6a-m)+12a)
3)5y-(6y-(7y-(8y-1)))
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Answer 1

Объяснение:

2)

$12m - ((6a - m) + 12a) =12m - (6a - m + 12a) = 12m - (18a - m) = 12m - 18a + m = 13m - 18a$

3)

$5y - (6y - (7y - (8y - 1) )) = 5y - (6y - (7y - 8y + 1)) = 5y - (6y - ( - y + 1)) = 5y - (6y + y - 1) = 5y - (7y - 1) = 5y - 7y + 1 = - 2y + 1$